The final step in resolving a union dispute is which of the following?

Arbitration is indeed the correct answer because it represents a formal process in which a neutral third party, known as an arbitrator, is brought in to make a binding decision on the dispute after both parties have presented their cases. This step typically follows unsuccessful negotiations or mediation attempts, signifying it is often the last course of action to resolve a union dispute. The arbitrator’s decision is legally enforceable, and both parties must adhere to the outcome, making this a definitive endpoint in the dispute resolution process.

Mediation, while also a method for dispute resolution, involves a mediator who facilitates discussions between the parties to help them reach a mutually agreeable solution. Unlike arbitration, the mediator does not impose a decision, so it is typically an earlier step in the dispute resolution process rather than the final step.

An injunction is a legal order to prevent a party from acting in a certain way, typically sought through the court system. While it can be related to disputes, it does not directly resolve the underlying issues between a union and an employer.

Check-off refers to the process of automatically deducting union dues from employees' paychecks and is not a dispute resolution method, but rather an administrative mechanism related to union operations.